target/arm: Add read/write_neon_element32

Model these off the aa64 read/write_vec_element functions.
Use it within translate-neon.c.inc.  The new functions do
not allocate or free temps, so this rearranges the calling
code a bit.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201030022618.785675-6-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/target/arm/translate.c b/target/arm/translate.c
index 88ded4ac2c..0ed9eab0b0 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -1165,6 +1165,32 @@ static inline void neon_store_reg32(TCGv_i32 var, int reg)
     tcg_gen_st_i32(var, cpu_env, vfp_reg_offset(false, reg));
 }
 
+static void read_neon_element32(TCGv_i32 dest, int reg, int ele, MemOp size)
+{
+    long off = neon_element_offset(reg, ele, size);
+
+    switch (size) {
+    case MO_32:
+        tcg_gen_ld_i32(dest, cpu_env, off);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+}
+
+static void write_neon_element32(TCGv_i32 src, int reg, int ele, MemOp size)
+{
+    long off = neon_element_offset(reg, ele, size);
+
+    switch (size) {
+    case MO_32:
+        tcg_gen_st_i32(src, cpu_env, off);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+}
+
 static TCGv_ptr vfp_reg_ptr(bool dp, int reg)
 {
     TCGv_ptr ret = tcg_temp_new_ptr();